|Publication number||US6944292 B2|
|Application number||US 09/815,386|
|Publication date||Sep 13, 2005|
|Filing date||Mar 22, 2001|
|Priority date||Mar 22, 2001|
|Also published as||US20020136396, WO2002078359A2, WO2002078359A3|
|Publication number||09815386, 815386, US 6944292 B2, US 6944292B2, US-B2-6944292, US6944292 B2, US6944292B2|
|Inventors||Amy J. Witty, Jason Piehl|
|Original Assignee||Adc Telecommunications, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (14), Non-Patent Citations (11), Classifications (16), Legal Events (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Telecommunications systems commonly include cables containing bundles of twisted pairs of conductors for transmitting telecommunications signals (e.g., voice only signals, data only signals, and combined/mixed voice and data signals, etc.). In these systems, mating connectors (e.g., 25 pair Telco or Amp connectors) are used to couple the cables to telecommunications equipment for processing. In a twisted pair telephone carrier system servicing residential and/or businesses, the system may include an MDF (Main Distribution Frame), a POTS (Plain Old Telephone Service) splitter for separating voice and date signals, and a DSLAM (Digital Subscriber Line Access Multi-Plexer).
For most systems, it is desirable to maximize the splitter densities. To maximize splitter densities, multiple splitters (e.g., 24 splitters) are commonly mounted on a printed circuit board to form a splitter card. Connectors are also typically mounted on the printed circuit board. Often, the connectors have exposed termination posts (i.e., leads). The exposed termination posts can also cause short circuits if inadvertently contacted. What is needed is an isolation structure that prevents the termination posts from being directly touched during installation, removal or servicing of a card assembly.
One aspect of the present invention relates to a splitter card including a circuit board. Line, data and voice connectors are connected to the circuit board. The connectors include contacts electrically connected to termination posts that extend through the circuit board such that ends of the termination posts are exposed. A plurality of splitters are also connected to the circuit board for splitting composite signals into voice and data signals. The circuit board includes conductive paths for directing composite signals from the line connector to the splitters, for directing voice signals from the splitters to the voice connectors, and for directing data signals from the splitters to the data connectors. Dielectric insulator members are connected to the circuit board to cover the exposed ends of the termination posts.
A variety of advantages of the invention will be set forth in part in the description that follows, and in part will be apparent from the description, or may be learned by practicing the invention. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
While the invention is amenable to various modifications and alternative forms, specifics thereof have been shown by way of example in the drawings and will be described in detail below. It is to be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the contrary, the invention is intended to cover all modifications, equivalents, and alternatives falling within the scope of the invention as defined by the appended claims.
In the following detailed description, references are made to the accompanying drawings that depict various embodiments in which the invention may be practiced. It is to be understood that other embodiments may be utilized, and structural and functional changes may be made without departing from the scope of the present invention.
Referring now to
In use of the system 10, the splitter device 16 receives a mixed voice and data signal from the MDF 12. The splitter device 16 splits the mixed signal into split signals, and then filters the split signals. For example, one of the split signals can be filtered to provide a voice only signal (i.e., the high frequency data portion of the signal is filtered out), while the other split signal can be filtered to provide a data only signal (i.e., the low frequency voice portion of the signal is filtered out). The data only signals are passed from the splitter device 16 to the DSLAM 18. The voice only signals are passed from the splitter device 16 to the MDF 12 for transmission to the voice switch 19.
Referring still to
An exemplary multi-pair cable connector 20 is shown in
The connector 20 includes a first end 26 defining a receptacle 27 sized for receiving a portion of a mating connector (not shown) connected at the end of a cable. The pairs of conductors 28 are positioned within the receptacle 27, and are adapted to contact corresponding conductor pairs of the mating connector. The conductors 28 extend through the connector 20 from the first end 26 to a second end 30. Portions of the conductors 28 located at the second end 30 are used to provide connections to conductor pairs of cables, wires, circuit boards, equipment, etc.
As best shown in
Still referring to
The connectors 56, 58 and 60 of the splitter cards 54 are preferably conventional 25-pair (i.e., 50 pin) connectors.
The connector 56 shown in
The splitter cards 54 of the splitter assembly each include a plurality of POTS splitters 88 (e.g., 24 splitters) or other types of splitters mounted on a circuit board 90. The circuit board 90 electrically connects the POTS splitters 88 to the connectors 56, 58 and 60.
The POTS splitters 88 of the splitter cards 54 can have a number of different configurations. For example, the splitters 88 can include conventional POTS splitter circuits. A conventional POTS splitter circuit functions to split a composite signal (i.e., a mixed voice/data signal) into two composite signals. One of the split composite signals is typically passed through one or more low pass filters capable of passing the relatively lower frequency voice content of the composite signal (e.g., less than about 4 kilohertz) and rejecting the composite signal content above the voice band (e.g., 30 kilohertz and above). The other split composite signal can be passed through a high pass filter that passes the composite signal content associated with the data band (e.g., about 30 kilohertz and above), and rejects the relatively lower frequency voice content of the composite signal. Alternatively, the other split signal can be unfiltered such that the signal remains a composite signal. For such an embodiment, it is assumed that the DSLAM or other digital multiplexer that ultimately receives the composite signal will provide any required high-pass filter elements to remove the relatively low frequency voice signal content of the composite signal. It will further be appreciated that ISDN filter circuits could also be used.
As described above, the connectors 58, 60 and 62 preferably include 25 pairs of contacts. Typically, one of the 25 pairs of contacts in each of the cable connectors 56, 58 and 60 is grounded or inactive. The remaining 24 contact pairs provided in each of the connectors 56, 58 and 60 are electrically connected to corresponding splitters 88. Thus, each splitter card 54 has 24 separate splitter circuits and has the capacity to process 24 separate twisted pair signals. Of course, the capacity of the splitter cards 54 can be varied. For example, in certain embodiments it may be desirable to provide more or fewer splitters at each card (e.g., any number of splitters can be provided such as 8, 24, 48, 96, etc.). Thus, the number of separate circuit paths provided by the splitter cards can be varied accordingly.
In use, a composite signal is inputted into the splitter card 54 through the line connector 56. From the line connector 56, the composite signal is carried to a corresponding one of the POTS splitters 88. At the POTS splitter 88, the composite signal is split into a high frequency data signal and a low frequency voice signal. The high frequency data signal is conveyed from the POTS splitter 88 to the data connector 60 through tracings 98. The low frequency voice signal is conveyed from the POTS splitter 88 to the POTS connector 58 through tracings 96.
Due to the relatively large distance traversed across the width of the chassis 52 (e.g., about 18 inches), the circuit boards 90 of the splitter cards 54 have a tendency to bow in response to gravity. This bowing is particularly an issue when cables are connected to the card connectors 56, 58 and 60 because the weight of the cables can cause the cards 54 to sag. This sagging adds stress to the circuit boards 90 and connectors 56, 58 and 60. To resist this tendency, a reinforcing rib 100 (shown in
As shown in
The top and bottom mounting flanges 106 are preferably recessed (i.e., rearwardly offset) relative to the front portion 102. This rearward offset is preferably provided by offset portions 109 (best shown in
The retaining brackets 62 each include a plurality of card support members 112 that project rearwardly from the front portion 102. The card support members 112 are arranged in pairs with each pair corresponding to one of the POTS splitter cards 54. The pairs of support members 112 define two columns of support members 112 that extend along left and right edges of the retaining brackets 62. When mounted on the chassis 52, the columns extend in a vertical orientation.
The card support members 112 cooperate to define notches 114 for receiving front edges 116 of the circuit boards 90. Each of the notches 114 is defined by a ramp surface 118 and a support surface 120 (see FIGS. 9C and 10B). Each of the notches 114 is also defined by an opposing surface 122 that opposes the support surface 120. Notch end walls 124 extend between the surfaces 120 and 122. In use, the ramp surfaces 118 function to guide the front edges 116 of the circuit boards 90 into their corresponding notches 114 on the retaining brackets 62. Once the circuit boards 90 are fully received within the notches 114, the front edges of the circuit boards 90 are captured between the opposing surfaces 120 and 122 (see FIG. 10B). As so positioned, vertical movement of the circuit boards 90 is resisted. Additionally, the support surfaces 120 provide support at intermediate locations of the circuit boards 90 (i.e., at locations between the tracks 74) to prevent the circuit boards 90 from bowing. Moreover, the notch end walls 124 retain the cards 54 within the chassis 52.
In one non-limiting embodiment, the brackets 62 are made by bending sheet metal to form a “C” shaped channel. The notches 114 are cut into the channel walls to form the individual card support members 112.
A lack of clearance prevents the brackets 62 from having card support members 112 corresponding to the lowermost splitter card. To better support the front edge of this card, the lowermost card's corresponding tracks 74 are forwardly extended as compared to the other tracks 74 (see FIG. 4). Also, reinforcing tabs (not shown) can project upwardly from the bottom wall 66 to provide intermediate support to the lowermost card 54.
As shown in
Preferably, each recess 134 is sized to receive all 50 termination posts 92 of a standard 25 pair connector (as shown in FIGS. 7A and 7B). In one embodiment, the recess 134 has a length of at least 2 inches (the approximate length of a typical terminal post lay-out) and a width of at least 0.16 inches (the approximate width of a typical terminal post lay-out). Preferably, the recess 134 has a depth of at least 0.07 inches. In one embodiment, the recess has a depth in the range of 0.05-0.1 inches, a length in the range of 2-3 inches and a width in the range of 0.16-0.60 inches.
The insulator strips 130 also include mounting flanges 136 that project outward from opposite ends of the rectangular midportion 132. The mounting flanges 136 have rounded ends. Preferably, the mounting flanges 136 have thicknesses less than corresponding thicknesses of the rectangular midportions 132. In one particular embodiment, each mounting flange 136 has a thickness less than one-half a thickness of the corresponding rectangular midportion 132. The mounting flanges 136 define openings 138 for receiving fasteners 140 (e.g., screws as shown in FIG. 10A). Preferably, the flanges 136 are sufficiently recessed relative to the midportion 132 for the fastener heads not to project appreciably beyond the midportion 132 when installed.
In use, the insulator strips 130 are mounted to the underside of each splitter card 54 as shown in
The above specification, examples and data provide a complete description of the manufacture and use of the composition of the invention. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.
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|7||"Product Information", mPhase Technologies, 3 pages (no date).|
|8||"Product Release: Wilcom Announces Highest Density CO ADSL POTS Splitter Series", Wilcom, 2 pages (Nov. 6, 2000).|
|9||"PS-1103 ADSL Central Office Line Filter Shelf: Quick Step Installation Instructions for PS-1103 Shelf", Wilcom, 2 pages (Jun. 2000).|
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|U.S. Classification||379/413.04, 379/413.02, 379/413.03|
|International Classification||H04Q1/10, H05K3/34, H05K1/02|
|Cooperative Classification||H04Q1/10, H05K1/0256, H04Q2201/802, H04Q2201/12, H05K3/3447, H04Q1/142, H05K2201/10189, H04Q2201/10|
|European Classification||H05K1/02C6B, H04Q1/10|
|Jul 9, 2001||AS||Assignment|
Owner name: ADC TELECOMMUNICATIONS, INC., MINNESOTA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WITTY, AMY J.;PIEHL, JASON;REEL/FRAME:011962/0354
Effective date: 20010502
|Mar 13, 2009||FPAY||Fee payment|
Year of fee payment: 4
|Mar 13, 2013||FPAY||Fee payment|
Year of fee payment: 8
|Jul 6, 2015||AS||Assignment|
Owner name: TYCO ELECTRONICS SERVICES GMBH, SWITZERLAND
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ADC TELECOMMUNICATIONS, INC.;REEL/FRAME:036060/0174
Effective date: 20110930
|Oct 26, 2015||AS||Assignment|
Owner name: COMMSCOPE EMEA LIMITED, IRELAND
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TYCO ELECTRONICS SERVICES GMBH;REEL/FRAME:036956/0001
Effective date: 20150828
|Oct 29, 2015||AS||Assignment|
Owner name: COMMSCOPE TECHNOLOGIES LLC, NORTH CAROLINA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COMMSCOPE EMEA LIMITED;REEL/FRAME:037012/0001
Effective date: 20150828
|Jan 13, 2016||AS||Assignment|
Owner name: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT, IL
Free format text: PATENT SECURITY AGREEMENT (ABL);ASSIGNOR:COMMSCOPE TECHNOLOGIES LLC;REEL/FRAME:037514/0196
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Owner name: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT, IL
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